31213424024321 has 32 divisors (see below), whose sum is σ = 39887317969920. Its totient is φ = 23721911928000.

The previous prime is 31213424024317. The next prime is 31213424024327. The reversal of 31213424024321 is 12342042431213.

It is a happy number.

It is not a de Polignac number, because 31213424024321 - 2² = 31213424024317 is a prime.

It is a super-2 number, since 2×31213424024321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213424024327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29430851 + ... + 30472968.

It is an arithmetic number, because the mean of its divisors is an integer number (1246478686560).

Almost surely, 2^{31213424024321} is an apocalyptic number.

It is an amenable number.

31213424024321 is a deficient number, since it is larger than the sum of its proper divisors (8673893945599).

31213424024321 is a wasteful number, since it uses less digits than its factorization.

31213424024321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59904005.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31213424024321 its reverse (12342042431213), we get a palindrome (43555466455534).

The spelling of 31213424024321 in words is "thirty-one trillion, two hundred thirteen billion, four hundred twenty-four million, twenty-four thousand, three hundred twenty-one".